You don’t.
It’s a game that stays with you.
I mean, calling it a game is doing LIS a disservice. It’s a story that will stay with you and the characters do tend to effect you in real life.
For example, I’ve seen many people say how they now gauge what they’re looking for in a friend/girlfriend by their favourite character in the game, usually ends up being Chloe lol
Time helps you get over it, like with everything important to you/shocking stuff etc.
Getting over it is the wrong phrase though imo because it’s not something you want to get over. It’s a really enjoyable story that you probably will always recall and think about every so often.
Kinda like Game of Thrones, you’ll be heavily invested in it for a long time, possibly forever but that unhealthy obsession with it does die down (Thankfully 😅) after a while.
Don’t worry, we all go through the LIS Depression haha.